filter.c File Reference

#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <math.h>
#include "common/axis.h"
#include "common/filter.h"
#include "common/maths.h"

Include dependency graph for filter.c:

Macros
#define	M_LN2_FLOAT   0.69314718055994530942f
#define	M_PI_FLOAT   3.14159265358979323846f
#define	BIQUAD_BANDWIDTH   1.9f /* bandwidth in octaves */

Functions
float	filterApplyPt1 (float input, filterStatePt1_t *filter, uint8_t f_cut, float dT)
void	BiQuadNewLpf (float filterCutFreq, biquad_t *newState, uint32_t refreshRate)
float	applyBiQuadFilter (float sample, biquad_t *state)
int32_t	filterApplyAverage (int32_t input, uint8_t count, int32_t averageState[])
float	filterApplyAveragef (float input, uint8_t count, float averageState[])

Macro Definition Documentation

#define BIQUAD_BANDWIDTH   1.9f /* bandwidth in octaves */

#define M_LN2_FLOAT   0.69314718055994530942f

#define M_PI_FLOAT   3.14159265358979323846f

Function Documentation

float applyBiQuadFilter	(	float	sample,
		biquad_t *	state
	)

void BiQuadNewLpf	(	float	filterCutFreq,
		biquad_t *	newState,
		uint32_t	refreshRate
	)

int32_t filterApplyAverage	(	int32_t	input,
		uint8_t	count,
		int32_t	averageState[]
	)

float filterApplyAveragef	(	float	input,
		uint8_t	count,
		float	averageState[]
	)

float filterApplyPt1	(	float	input,
		filterStatePt1_t *	filter,
		uint8_t	f_cut,
		float	dT
	)